I used to subscribe to Discover and PC Magazine, but I never read them at all. Then I subscribed to Entertainment Weekly, which I read religiously every week cover to cover. I decided, though, that I wasn't getting enough real reading done so I killed off that subscription. Now all I subscribe to is The Writer. And I do read it every month. I also just got a subscription to McSweeney's, which is a quarterly literary magazine (ask SFG about it ).
My wife subscribes to a couple different parenting magazines, but she says she's probably going to kill off those subscriptions because the articles tend to repeat themselves far too much.
Oh, and I thought I wangled a free subscription to Maxim, but I'm concerned that I might've been had. I haven't received my first issue yet, and it's been a while.